Rim poll

I'm building up an AM wheelset for my Coiler in a month or two, looking for opinions on the rims listed above (or any other useful suggestions). Use will be all around trail riding,from pure XC to some Shore stuff but nothing bigger than a 5-6 foot drop to transition (I have a big bike for the really rough stuff) so I need a good mix of durability and moderate weight. The bike is a Coiler Deluxe and the rest of the build will be Hope Pro IIs with DT Swiss Competition spokes & brass nips.

Bontrager Duster Rim. 28mm wide, welded, OSB and they are around 460 grams a piece. I have even seen them on Trek's new Session (custom build). Downside is that they can only be ordered from a trek dealer for around $70-$80.

Something not often mentioned about Mavic Tubeless rims.
They do not have 32-36 holes drilled through the inner walls, like their non-tubeless counterparts. This makes them both heavier and stronger than mavic's non-UST rims.

Carbuncle, I build all my own wheels and have had great luck with Mavic rims. IMHO nothing "builds" like a mavic. (yes I have also built wheels with DT & bontrager rims). I'm not sure what's right for you though, since I don't know your weight or riding style even though I think we ride many of the same trails. If you have no interest in running tubeless ever, the 721 might be the ticket. I think the 819's are as light as I would go for our local trails, so I would avoid the 719 (just an 819 with 32 holes drilled through the inner wall).

A lot of people want something between the 819 and 823 for "all mountain" riding... you could do the 823 with 1.8 (15 guage) spokes to help split the difference weight-wise. if you go with any of the mavic UST rims, make sure 16mm brass nipples are used (regular nipples are 12mm I think)

Something not often mentioned about Mavic Tubeless rims.
They do not have 32-36 holes drilled through the inner walls, like their non-tubeless counterparts. This makes them both heavier and stronger than mavic's non-UST rims.

Carbuncle, I build all my own wheels and have had great luck with Mavic rims. IMHO nothing "builds" like a mavic. (yes I have also built wheels with DT & bontrager rims). I'm not sure what's right for you though, since I don't know your weight or riding style even though I think we ride many of the same trails. If you have no interest in running tubeless ever, the 721 might be the ticket. I think the 819's are as light as I would go for our local trails, so I would avoid the 719 (just an 819 with 32 holes drilled through the inner wall).

A lot of people want something between the 819 and 823 for "all mountain" riding... you could do the 823 with 1.8 (15 guage) spokes to help split the difference weight-wise. if you go with any of the mavic UST rims, make sure 16mm brass nipples are used (regular nipples are 12mm I think)

I'm about 230 without gear, and we do ride a the same trails. I'm not interested in making the tubeless switch right now, I definitely have heard enough bad reports from folks around here about the DTs that they aren't really on my list. I'm not thinking a 460 gram rim like the 719 is going to handle me sending it on the 911 drop or the 1st diving board on Evo (which is about the worst these wheels will have to take, although I may use the Coiler for Fromme once I swap forks) so I think your suggestion of the 721 is pretty solid. I want to drop weight, but not in places where it really will affect durability. Thanks again for the input, hopefully we'll catch up sometime on the trails! ANd thanks to everyone else who has given input and voted, it has helped alot.